JPH03455A - Casting apparatus - Google Patents

Abstract

PURPOSE:To obtain a product having high quality without any casting defect by arranging a flow divider providing a flow dividing wall for dividing molten metal flowing from a sprue into cavity in right and left directions at the time of filling up the cavity with the molten metal in a sleeve through runner. CONSTITUTION:In the sleeve 6, a plunger 7 for pushing out the molten metal M is set as slidable. At tip part of the sleeve, a sprue collar 8 is arranged and the flow divider 9 is inserted in this sprue collar, and molten metal flow passage 10 is formed between the flow divider and the sprue collar. Between a fixed die 1 and movable die 2, the runner 11 is formed under clamping condition of the dies. The runner 11 is extended as fan-shape from the sprue collar part toward both sides of the cavity 4, and at the center of the runner, the flow dividing wall 12 extended from the flow divider 9 is set. The molten metal flowing out from the flow passage 10 is divided into the right and left direction while restraining turbulent flow so as to sufficiently run around to both side parts of the cavity 4. By this method, the part of mis-running is eliminated and the product having high quality without any casting defect can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a casting apparatus suitable for casting horizontally long or wide-shaped products such as cylinder blocks.

(Prior art) In order to cast a cylinder block using AJ1 alloy, etc., conventionally, the molten metal of A2 alloy stored in a sleeve is pressurized with a plunger, and it is poured into the cavity through a sprue and a runner connected to the sprue. I am trying to fill it up.

(Problem to be Solved by the Invention) In general, cylinder blocks having a large number of cylinders have a horizontally long or wide shape, and when a product with such a shape is cast by the conventional method described above, both sides of the cavity are covered with sprues. Since the distance from the center is greater than the center, the flowability of the metal is poor and casting defects are likely to occur due to poor filling.

(Means for Solving the Problems) In order to solve the above problems, the present invention arranges a flow divider that divides the flow of molten metal into left and right sides in a runner that connects a sprue and a cavity.

(Function) By placing a flow divider on the runner, the molten metal can be actively guided to both sides of the cavity, and by making the flow path depth of the runner deeper on both sides than in the center, the above effect can be further enhanced. encouraged.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view of a casting device according to the present invention, and FIG. 2 is a view taken along the arrow A-A in FIG. 1. The casting device includes a fixed mold 1,
A cavity 4 for casting a cylinder block is formed by the movable mold 2 and the sliding mold 3, and a mold 5a for molding a water jacket etc. is set in the cavity 4, and a cast pin 5b is set in the cavity 4. I'm letting you do it.

Further, a sleeve 6 for storing molten metal M is attached to the fixed mold 1. A fixed amount of liquid is melted into the sleeve 6 from a supply device (not shown). %M is supplied, and there is molten water in the sleeve 6. A plunger 7 for extruding %M is slidably disposed. Furthermore, a sprue collar 8 is provided at the tip of the sleeve 6 , and a flow divider 9 is fitted into the sprue collar 8 to form a molten metal flow path 10 between the flow divider 9 and the sprue collar 8 .

Further, a runner 11 is formed between the fixed mold 1 and the movable mold 2 with the molds closed. The runner 11 has a relatively shallow flow path, and expands in a fan shape from the sprue collar 8 toward both sides of the cavity 4, and further has a dividing wall extending from the diverter 9 in the center of the runner 11. 12 is arranged so that the molten metal M flowing out from the channel 10 of the sprue is divided into left and right sides while suppressing turbulence, so that it can sufficiently flow around both sides of the cavity 4.

FIG. 3 is a diagram showing another embodiment, and in this embodiment, in addition to the center dividing wall 12, left and right auxiliary dividing walls 13.13 are shown.
is added to strengthen the flow of molten metal M to both sides and enhance the rectification effect, and as shown in Figure 4, which is a sectional view taken along line B-B in Figure 3, between the dividing walls 12 and 13. By making the depth of the flow path 15 on the outside of the dividing wall 13 deeper than the depth of the flow path 14 near the center in the runner 11 to be formed, the flow path resistance of the molten metal M toward both sides of the cavity 4 is reduced. , so that it goes around enough to both sides.

Further, in another embodiment shown in FIG. 5, two auxiliary flow divider walls 13 are provided on the left and right sides to perform finer flow control. In particular, the effect of the dividing wall is fully exhibited when extending from the sprue, so in the embodiment shown in Fig. 5, the auxiliary dividing wall 13 is not extended to the cavity 4, so as to reduce resistance. did.

Furthermore, in the embodiment shown in FIG. 6, a four-cylinder cylinder block is cast. Runner 11 is made to join at the part where 12 is cut.

(Effects of the Invention) As described above, according to the present invention, in a casting apparatus in which molten metal in a sleeve is pressurized by a plunger and filled into a cavity via a runner, a flow divider is provided in the runner. Since the molten metal is guided to both sides of the cavity by this flow splitter, there are no parts that cause poor drainage, and a high quality product without casting defects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a casting apparatus according to the present invention, FIG. 2 is a view taken along the arrow A-A in FIG. 1, and FIG. 3 is a second embodiment showing another embodiment.
Figure 4 is a cross-sectional view taken along the line B-B of Figure 3, Figure 5 is similar to the figure.
This figure and FIG. 6 are similar to FIG. 2 showing another embodiment. In addition, in the drawing, 1 is a fixed type, 2 is a movable type, 4 is a cavity,
8 is the sprue collar, 9 is the splitter, 11 is the runner 12.
13 is a dividing wall, and M is a molten metal. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Part 1 Patent Attorney
Kuni Ohashi, Patent Attorney, Department
Yama Yu Figure 6

Claims (2)

[Claims] (1) In a casting device in which molten metal is filled from a sprue through a runner into a horizontally continuous cavity formed between molds, the sprue has a dividing wall that divides the molten metal from the sprue into the cavity into left and right. A casting device characterized in that it is provided with a shunt element. (2) Claim (1) characterized in that the channel depth of the runner is deeper at both sides than at the center.
The casting equipment described in .